After lots of intense training, Leonardo, leader & eldest of the four brothers, sculpted himself a nice muscular body that was ready for combat. But with a larger size and stronger muscles came with another surprise: a round belly!
"Dammit," thought Leonardo, as he struggled to put on his once-fitting belt that symbolized his leadership. "This is not happening! There's no way this stupid belt could've possibly shrunk!" Little did poor Leonardo know that he also went through some kind of growth spurt. Could it have been all the pizza he had been snacking on? Could he have overdosed on Mutagen? Or could he have secretly taken too many muscle supplements laced with bull growth hormones? Either way, Leonardo had quite the growth spurt he had ever had in his life.

Leonardo © Eastman & Laird, Nickelodeon, & Paramount